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TIGER data published through February 2007 (2006 Second Edition) were in a custom text-based format formally known as TIGER/Line files. In 2008, data in shapefile format was published. Please note that shapefiles are not topological, therefore may create slivers when comparing TIGER/Line boundaries.
Terrestrial Ecological Systems of the United States: A mid-scale ecological classification of over 800 ecosystems in North America. USGS Gap Analysis Program: The USGS Gap Analysis Program maintains four primary data sets: land cover, protected areas, species and aquatic. The GAP Land Cover Data Set is the most complete map ever produced of ...
The National Estuarine Research Reserve System is a network of 30 protected areas established by partnerships between the National Oceanic and Atmospheric Administration (NOAA) and coastal states. The reserves represent different biogeographic regions of the United States. The National Estuarine Research Reserve System protects more than 1.3 ...
This list of Ramsar sites in the United States are those wetlands that are considered to be of international importance, protected under the Ramsar Convention treaty. The United States as of 2020, has 41 sites designated as "Wetlands of International Importance" with a surface area of 1,884,551 hectares (7,276.29 sq mi; 18,845.51 km 2 ).
Wildlife management areas of the United States by state (21 C) A. Nature reserves in Alabama (4 C, 8 P) Nature reserves in Alaska (3 C, 6 P) Nature reserves in ...
United States Forest Service (USFS) United States Fish and Wildlife Service (FWS) Bureau of Land Management (BLM) These wilderness areas cover about 4.5% of the United States' land area, an area larger than the state of California. About 52% of the wilderness area is in Alaska, with 57,425,569 acres (89,727.452 sq mi; 232,393.03 km 2) of ...
The U.S. government designed TIGER grants in order to incentivize bettering environmental problems and reducing the United States' dependence on energy. On the economic front, the United States hopes infrastructure investment will encourage job creation, a pressing political priority; this would likely require the project to be shovel-ready.
The National Park System of the United States is the collection of physical properties owned or administered by the National Park Service. The collection includes all national parks and most national monuments, as well as several other types of protected areas of the United States. As of December 2024, there are 433 units of the National Park ...